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mb_strrpos
Find position of last occurrence of a string in a string
(PHP 4 >= 4.0.6, PHP 5)
int mb_strrpos ( string haystack, string needle [, int offset [, string encoding]] )
mb_strrpos() returns the numeric position of
the last occurrence of needle in the
haystack string. If
needle is not found, it returns FALSE.
mb_strrpos() performs multi-byte safe strrpos() operation based on number of characters. needle position is counted from the beginning of haystack. First character's position is 0. Second character position is 1.
If encoding is omitted, internal encoding is assumed.
encoding is character encoding. If it is not specified, internal character encoding is used.
As of PHP 5.2.0 offset may be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an arbitrary point prior to the end of the string.
The encoding parameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility, encoding can be specified as the third parameter, but doing so is deprecated and will be removed in the future.